GMAT PREP II QUESTION 2

[kajcha]

Both machines together produce 16000 pencils in 1 hour

So in 6 hours they wil produce 96000 pencils

Remaining 4000 will be produced in next 15 mins.

So, each macihne should run for 6.25 hours.

[kajcha]

aah.. I didn't notice "at least" part of the Q..

Now, In max of 8 hours machine A will produce 9000*8 = 72000 pencils.

Remaining 28000 need to be produced by machine B.

So, min no of hours machine B should run = 28000/7000 = 4

Sorry for confusion

[wongee]

Dee,

How DID you do on the exam. Hope it went off well.